Nicotine has been studied for the first time by pulse radiolysis techniques.

摘要首次运电子脉冲辐解技术研究古丁分子的化学活性。

His teeth were stained with nicotine from years of smoking.

他的牙齿因多年抽而被古丁染黄了。

Many smokers who are chemically addicted to nicotine cannot cut down easily.

许多有古丁瘾的抽人不容易把戒掉。

The college students were also less likely to have a drug-use disorder, nicotin nicotine dependence or bipolar disorder.

大学生滥，古丁依赖症和躁郁症的可能性较少。

This article introduces micro - titration measuring method to replace the normal nonhydraulic titration method in measuring nicotine content in tobacco.

本文首次微型称量简定法,代替常规非水滴定法测定草中古丁含量。